JP7069641B2 - Work vehicle - Google Patents

Description

The present invention relates to a work vehicle used as an agricultural vehicle or the like.

Conventionally, as a work vehicle used for traveling in a field and spraying a chemical solution, a step for getting on and off is provided at the rear part of the machine body (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2014-73096

The above-mentioned configuration is a configuration in which the boarding / alighting step itself is folded, and is not a configuration in which the entire boarding / alighting step is rotated. Therefore, it may come into contact with long crops. In addition, it was difficult to get on and off at the boarding / alighting step at night or in a dark place.
An object of the present invention is to provide a work vehicle that solves the above-mentioned problems.

The above object of the present invention is achieved by the following configuration.

That is, in the invention according to claim 1, the traveling vehicle body 2 provided with the left and right front wheels 6, 6 and the left and right rear wheels 7, 7 and the rotating portions provided on the left and right sides of the traveling vehicle body 2 are used. In a work vehicle provided with a pair of left and right side booms 40b, 40b rotatably arranged toward the left and right sides of the traveling vehicle body 2, and a chemical tank 30 for storing a spraying agent mounted on the traveling vehicle body 2. A boarding / alighting step 13 is provided at the rear of the traveling vehicle body 2, the boarding / alighting step 13 is configured to be rotatable in the vertical direction, a carrier 10 is provided at the rear of the traveling vehicle body 2, and a light 75 and a light illuminating the boarding / alighting step 13. A storage switch 71 is provided with a lighting switch of 75 on the carrier 10, two rotation motors 70 for rotating the boarding / alighting step 13 in the vertical direction, and driving the rotation motor 70 to move the boarding / alighting step 13 up and down. An ultrasonic sensor 73 for detecting an obstacle in front of the traveling vehicle body and an ultrasonic sensor 74 for detecting an obstacle in the rear of the traveling vehicle body are provided in the boarding / alighting step 13, and the obstacle is in the boarding / alighting step. When there is a possibility of contact with the 13, the work vehicle is configured to raise the boarding / alighting step 13 .

In the invention according to claim 2 , an operation panel 77 is provided on the right side of the driver's seat 4, a centralized operation lever 79 that does not move is provided on the operation panel 77, and a switch for raising / lowering and turning the side boom is provided above the centralized operation lever 79. The work vehicle according to claim 1, wherein a switch for carrying out an extension slide and a reduction slide of the side boom is provided .

Since the present invention is configured as described above, in the invention of claim 1, it is possible to prevent the boarding / alighting step 13 from coming into contact with a long crop or the like. Further, in a dark place such as at night or in a barn, getting on and off in the getting on and off step becomes easy, and the rotation of the getting on and off step 13 becomes easy. Further, by providing two rotation motors 70, the rotation of the boarding / alighting step 13 is stabilized. In addition, it is possible to prevent the step 13 for getting on and off and the crop from coming into contact with each other.
In the invention of claim 2 , space can be saved and operability is improved .

Left side view of chemical sprayer Perspective view from the front of the chemical sprayer Perspective view from the rear of the drug sprayer Top view of the chemical sprayer Plan view of working condition of chemical sprayer Rear view of chemical sprayer Rear view of another embodiment of the chemical spraying vehicle Right side perspective view of the operation panel

The chemical spraying vehicle of the embodiment (embodiment) for carrying out the present invention will be described in detail with reference to the drawings. The present invention is not limited to the contents described in the following embodiments. In addition, the components described in the embodiments include those that can be easily assumed by those skilled in the art and those that are substantially the same. Further, the configurations described below can be combined as appropriate. Further, various omissions, substitutions or changes of the configuration can be made without departing from the gist of the present invention.

The chemical spraying vehicle 1 according to the present embodiment is a work vehicle in which an operator such as a worker rides on a traveling vehicle body 2 and sprays chemicals to a field while performing a driving operation. As shown in FIGS. 1 to 3, the chemical spraying vehicle 1 includes a traveling vehicle body 2, a cabin 20, a chemical tank 30, a pest control boom 40 for spraying chemicals supplied from the chemical tank 30, and the like. Has been done. In the present embodiment, the traveling direction of the chemical spraying vehicle 1 is a direction along the front-rear direction of the traveling vehicle body 2, and is a direction toward the front glass GF from the driver's seat 4 when the chemical spraying vehicle 1 goes straight. Further, the vehicle width direction or the left-right direction of the traveling vehicle body 2 is a direction horizontally orthogonal to the traveling direction. Further, the vertical direction of the traveling vehicle body 2 is a direction vertically orthogonal to the traveling direction.

The traveling vehicle body 2 includes a main frame 3, a driver's seat 4, a steering handle 5, front wheels 6, and rear wheels 7. The main frame 3 is formed so as to extend to the front and rear of the traveling vehicle body 2. The driver's seat 4 is a seat for the operator to sit down when operating the drug spraying vehicle 1. At an appropriate position around the driver's seat 4, an operation unit 90 for controlling operations such as opening / closing the control boom 40 and spraying chemicals is arranged. The steering handle 5 changes the traveling direction of the chemical spraying vehicle 1 by steering at least the left and right front wheels 6 and 6 by a rotation operation by the operator. The front wheels 6 and 6 are steering wheels that are steered by at least the rotation operation of the steering handle.

In the front wheels 6 and the rear wheels 7, the power of the engine in the bonnet BN is appropriately changed in the transmission case (not shown), and the changed power is transmitted to drive the engine in rotation.

The cabin 20 forms a passenger compartment by surrounding the driver's seat 4, the equipment around it, the steering wheel, and the like. The cabin 20 is arranged between the medicine tank 30 and the control boom 40. The cabin 20 is composed of a cabin frame 21 (21a, 21b, 21c, etc.), a cabin roof 22, left and right opening / closing doors 25L, 25R, and the like.

The cabin frames 21 are left and right first front frames 21a and 21a arranged on the left and right sides of the front of the cabin 20 in the vehicle width direction and standing on the main frame 3, and left and right first front frames 21a and 21a. It is composed of left and right second frames 21d and 21d arranged behind the left and right second frames 21d and 21d and left and right third frames 21e and 21e arranged behind the left and right second frames 21d and 21d. Further, behind the left and right third frames 21e and 21e, left and right fourth frames 21b and 21b that are not erected on the main frame 3 are configured, and the left and right first front frames 21a and 21a and the left and right first frames 21a and 21a are configured. It is composed of two frames 21d and 21d, left and right third frames 21e and 21e, and an upper frame 21c connecting the upper portions of the left and right fourth frames 21b and 21b.

The lower ends of the left and right fourth frames 21b and 21b and the intermediate portions of the left and right third frames 21e and 21e are connected by the left and right fifth frames 21f and 21f. The intermediate portions of the left and right first front frames 21a and 21a are connected by the front connecting frame 21g. A little above the lower ends of the left and right fourth frames 21b and 21b are connected by a rear connecting frame 21h.

A front glass GF is attached between the front connecting frame 21g and the upper frame 21c, and a lower front glass GFu is attached below the front connecting frame. Further, a rear glass 57 is provided between the rear connecting frame 21h and the upper frame 21c, and the rear glass 57 is configured to be openable and closable toward the outside with the upper side as a fulcrum. Further, the left first glass LG1 is attached between the left first front frame 21a and the left second frame 21d, and between the left third frame 21e and the left fourth frame 21b. The second glass LG2 on the left is attached, and the first glass RG1 on the right is attached between the first front frame 21a on the right and the second frame 21d on the right, and the third frame 21e on the right and the second on the right. A capacitor 48 that cools and liquefies the air-conditioning refrigerant is attached between the four frames 21b, and the second glass RG2 on the right is attached below the capacitor 48.

The drug tank 30 is installed close to the left and right fourth frames 21b and 21b from below to the left and right fifth frames 21f and 21f, and further to the rear of the left and right third frames 21e and 21e. Left and right work lights WR1 and WR2 are provided on the upper part of the front part of the cabin 20. Further, left and right headlights BFL and BFR are provided on the front portion of the bonnet BN. The left and right work lights WR1 and WR2 are configured to be interlocked with the left and right headlights BFL and BFR. That is, when the left and right work lights WR1 and WR2 are turned on, the left and right headlights BFL and BFR are turned off. As a result, since the lights are not turned on at the same time, the charge / discharge performance can be ensured and the battery can be prevented from running out.

The drug tank 30 is a container for accommodating the drug sprayed from the boom 40. The drug tank 30 is located behind the cabin 20 as shown in FIG. As shown in FIG. 4 in a plan view, the medicine tank 30 is formed in a U shape so as to surround the left and right sides and the rear side of the driver's seat 4. The drug tank 30 is detachably mounted on the main frame 3. The chemicals are liquids such as fertilizers, pesticides and the like dissolved in a solvent (for example, water), and liquids containing solids such as fertilizers and pesticides (for example, water).

As shown in FIG. 5, the control boom 40 sprays the chemical on the front side of the chemical spraying wheel 1. The boom 40 is provided on the front side of the traveling vehicle body 2. The boom 40 is composed of a center boom 40a and side booms 40b and 40b on both sides. The center boom 40a is arranged on the front side of the chemical spraying vehicle 1 and extends horizontally in the vehicle width direction of the traveling vehicle body 2. A plurality of nozzles 41a for injecting a drug in a mist form are arranged on the center boom 40a at intervals. The side booms 40b are attached to the left and right sides of the center boom 40a so as to be switchable between a spraying posture extending in the vehicle width direction of the traveling vehicle body 2 and a storage posture along the left and right sides of the traveling vehicle body 2. The side boom 40b is supported by boom receivers 80 arranged on both left and right sides on the rear side of the traveling vehicle body 2 in the retracted posture. A plurality of nozzles 41b for spraying the medicine in the form of mist are arranged on the side boom 40b at intervals.

The condenser 48 of the air conditioner is provided at the above-mentioned position and cools the refrigerant, and the liquefied refrigerant is sent to the receiver dryer 55 installed behind the condenser 48.

As shown in FIG. 2, the air conditioner main body 100 that generates cooling air is arranged on the ceiling of the cabin 20 and is covered with a cabin roof 22 that covers the upper part of the cabin 20. As a result, the air conditioner main body 100 can be protected from the chemical liquid scattered during the control. Further, as shown in FIG. 1, the outside air introduction unit 110 of the air conditioner is configured to be provided below the center of the rear portion of the cabin roof 22. This makes it possible to introduce outside air from the rear part where the chemical liquid is less scattered. Since the outside air introduction portion 110 is provided at the rear portion of the cabin roof 22 and the opening thereof is on the cabin 20 side, it is possible to suppress the intrusion of the chemical solution into the cabin 20.

Left and right opening / closing doors 25L and 25R fitted with glass plates are provided on both side surfaces of the cabin 20. When the left opening / closing door 25L is closed, the left opening / closing door 25L is located at a portion surrounded by the left second frame 21d, the left third frame 21e, the upper frame 21c, and the left end portion of the floor surface ST. It is configured to be. Since the right opening / closing door 25R is symmetrical with the left opening / closing door 25L, the description thereof will be omitted.

The carrier 10 is provided so as to project from the rear portion of the traveling vehicle body 2, and the transport handles 12R and 12L of the pump unit 11 are suspended and attached to the left and right support frames 9R and 9L provided below the carrier 10 (FIG. 6). This step 13 for getting on and off is mainly used for maintenance work of the medicine tank 30 and the boom receiver 80. In particular, it is used when the upper lid 30a of the medicine tank 30 is removed and the medicine is charged, or when a hose or the like is inserted to clean the inside of the medicine tank 30.

On the rear side of the rear wheel 7 on the left side, the boarding / alighting step 13 is detachably attached to the transport handle 12L with a spring pin 18 at a vertical direction of about 70 °. The step 13 for getting on and off is used to get on the driver's seat 4 of the traveling vehicle body 2, or to open the upper lid 30a of the chemical tank 30 to supply chemicals and water.

The boarding / alighting step 13 may be provided with two steps 13a and 13b at the top and bottom, and may be flipped up and fixed around the spring pin 18.

Further, the length of the step 13 for getting on and off is substantially the same as the width of the carrier 10, and is fixed on the carrier 10 when not in use.

A dedicated step for getting on and off may be provided between the front wheels 6 and the rear wheels 7 in order to get on the driver's seat 4.

Another configuration of the boarding / alighting step 13 will be described. As shown in FIGS. 1 and 7, the rotary motor 70 is provided on the upper part of the step 13 for getting on and off. When the rotation motor 70 is activated, the boarding / alighting step 13 rotates in the direction of the arrow P and rotates to the Q position (storage position). The storage switch 71 for storage is provided near the boarding / alighting step 13. Specifically, it is configured to be provided on the rotary motor 70 itself. Further, in order to set the boarding / alighting step 13 to the use position R, the use switch 72 is operated, and the rotation motor 70 itself is provided in the same manner as the storage switch 71. This makes it possible to prevent the crop or grass from coming into contact with the boarding / alighting step 13 when the crop or grass is unexpectedly large.

By providing two rotation motors 70 on the left and right, the rotation of the step 13 for getting on and off is stable.

As shown in FIG. 1, an ultrasonic sensor 73 for detecting an obstacle in front is provided in the boarding / alighting step 13, and when the obstacle may come into contact with the boarding / alighting step 13, the boarding / alighting step 13 is automatically performed. It is configured to be rotated to the Q position. Further, an ultrasonic sensor 74 for detecting an obstacle behind is provided in the boarding / alighting step 13, and when the obstacle may come into contact with the boarding / alighting step 13, the boarding / alighting step 13 is automatically rotated to the Q position. It is configured to be made to. As a result, the boarding / alighting step 13 can be protected both when moving forward and when moving backward.

The storage switch 71 and the switch 72 used may be provided in the cabin 20. By providing the driver's seat 4 at a usable position, the operation becomes easy. Further, the storage switch 71 and the use switch 72 may be provided near the step 13 for getting on and off, and may be further provided both in the cabin 20.

Further, a light 75 is provided on the carrier 10 so as to illuminate the boarding / alighting step 11. The lighting switch of the light 75 is provided on the carrier 10 in the vicinity of the light 75. This makes it easy to get on and off the step 13 for getting on and off at night or in a dark place in the barn.

FIG. 8 shows the operation panel 77 on the right side of the driver's seat 4. In the center of the operation panel 77, a center spraying lever 78a for spraying the chemical solution from the center boom 40a and left and right spraying levers 78b and 78b for spraying the chemical solution from the left and right side booms 40b and 40b are provided. Further, a centralized operation lever 79 is provided from the groove 78a1 of the center spraying lever 78a. Since the centralized operation lever 79 does not move, it does not affect the center spraying lever 78a. A grip 79a is provided on the upper portion of the centralized operation lever 79, and a plurality of switches are provided on the grip 79a.

Specifically, a cross switch 79d that raises and lowers the left and right side booms 40b and 40b and turns left and right, a slide switch (toggle switch) 79e that expands and contracts the left and right slides of the left and right side booms 40b and 40b, and left and right. Of the side booms 40b and 40b, the right switch 79b for moving the right side boom 40b, and the left switch 79c for moving the left side boom 40b among the left and right side booms 40b and 40b are provided.

As a result, space can be saved and operability is improved.

2 Traveling vehicle body 4 Driver's seat 6 Front wheel 7 Rear wheel 10 Carrier 13 Getting on and off step 30 Chemical tank 40b Side boom 70 Rotating motor 71 Storage switch 72 Use switch 73 Ultrasonic sensor for front obstacle detection 74 For rear obstacle detection Ultrasonic sensor 75 Light 77 Operation panel 79 Centralized operation lever that does not move

Claims (2)

The traveling vehicle body (2) provided with left and right front wheels (6, 6) and left and right rear wheels (7, 7), and the traveling vehicle body using rotating portions provided on the left and right sides of the traveling vehicle body (2). A pair of left and right side booms (40b, 40b) rotatably arranged toward both the left and right sides of (2), and a drug tank (30) for storing a spraying agent mounted on the traveling vehicle body (2). In the provided work vehicle, a boarding / alighting step (13) is provided at the rear of the traveling vehicle body (2), the boarding / alighting step (13) is configured to be rotatable in the vertical direction, and a carrier (carrier) is provided at the rear of the traveling vehicle body (2). 10) is provided, a light (75) that illuminates the boarding / alighting step (13), and a lighting switch for the light (75) are provided on the carrier (10), and the boarding / alighting step (13) is rotated in the vertical direction. Two dynamic motors (70) are provided, and a storage switch (71) and a use switch (72) that drive a rotary motor (70) to raise and lower the boarding / alighting step (13) are provided, and obstacles in front of the traveling vehicle body are provided. An ultrasonic sensor (73) for detecting an obstacle and an ultrasonic sensor (74) for detecting an obstacle behind the traveling vehicle body are provided in the boarding / alighting step (13), and the obstacle may come into contact with the boarding / alighting step (13). If there is, a work vehicle characterized in that it is configured to raise the boarding / alighting step (13) . An operation panel (77) is provided on the right side of the driver's seat (4), a centralized operation lever (79) that does not move is provided on the operation panel (77), and the side boom is raised and lowered and turned on the upper part of the centralized operation lever (79). The work vehicle according to claim 1, wherein a switch for performing an extension slide and a switch for performing an extension slide and a reduction slide of the side boom are provided .

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